Mower-sickle grinder.



J. H. IREY.

MOWER SICKLE GRINDBR.

APPLICATION FILED AUG. ze, 1911.

.1 ,0 1 9,649 Patented Mar. 5, 1912.

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J. H. IREY. MOWER SICKLE GRINDER.

APPLICATION FILED AUG. 2a, 1911.

1,019,649. Patented Mar.5, 1912.

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JAMES H. IREY, 0F PELICAN RAPIDS, MINNESOTA.

MOWER-SICKLE GRINDER.

Specification of Letters Patent.

Application filed August 23, 1911.

Patented Mar. 5, 1912.

Serial No. 645,587.

T o all whom it may concern:

Be it known that I, JAMES H. IREY, a citi- Zen of the United States,residing at Pelican Rapids, in the county of Otter Tail and State ofMinnesota, have invented certain new and useful Improvements in Mower-Sickle Grinders, of which the following is a specication.

My invention relates to improvements in grinding machines, and has forits leading object the provision of an improved attachment for use inconnection with an ordinary grind stone which will serve to so hold asickle bar with its cutting teeth bearing against the grind stone as toinsure the correct grinding of the various cutting teeth.

The further object of my invention is the provision of an improved`attachment of this character by the use of which any unskilled personmay quickly and satisfactorily sharpen the sickle teeth of a mower.

Another object of my invention is the provision of an improved devicewhich may be readily attached to the frame of an ordinary grind stoneand which may be locked in adjusted position to resiliently hold thesickle bar teeth against the grind stone in position to grind the saidteeth at the desired angle and which will thus enable one person tosecurely fasten the sickle bar in correct position to grind the teeththereof and then move into position to turn the grind stone and becertain that the teeth are better held against the face of the stonethan it is possible to hold the same by hand.

Other objects and advantages of my improved mower sickle tooth grinderwill be readily apparent by reference to the following description takenin connection with the accompanying drawings and it will be understoodthat I may make any modications in the specific structure shown anddescribed within the scope of my claims without departing from orexceeding the spirit of my invention.

Figure 1 represents a side elevation of a grind stone having myattachment applied thereto. Fig. 2 represents an enlarged view of aportion of the grind stone and frame showing my attachment holding asickle bar in position for grinding of the teeth thereof. Fig. 3represents an end view of my invention. Fig. 4 represents a top planview of Fig. 1. Fig. 5 represents a top plan view of Fig. 2. Fig. 6represents a sectional view on the line 6-6 of Fig. 4, and Fig. 7represents a sectional view on the line 7-7 of Fig. 4.

In the drawings, the numeral 1 designates the supporting frame of anordinary grind stone having the legs 2 connected by the' braces 3 andhaving the bearings 3 in which is rotatably engaged the shaft or axle 4bearing the grind stone 5 disposed between the side members of the frameand having secured on its projecting end the crank handle 6 for turningthe shaft and thus the grind stone.

Secured to the upper face of the side members of the frame 1 of thegrind stone are the guide plates 7, while riding on said plates is thebase block or table 8 of my invention. Said table member has secured tothe under face thereof the Z-shaped guide plates 9 which extend aroundt-he plates 7 secured to the frame 1 and engage said plates to retainthe table block thereon.

To regulate the sliding movement of the table block 8 along the frame l,I secure to the end of the frame 1 the bracket plate 10 having theoutwardly projecting sector shaped portion 11 to which is pivoted thecontrolling lever 12 provided with the usual locking pawl 13 controlledby the handle 14 and adapted to engage the toothed edge of the sector 11to lock the lever 12 lin adjusted position. A link 15 has one endpivoted to the lever 12 and extends through the groove 16 in the underside of the table block and is pivoted to the table block, rocking ofthe lever in different directions serving through the link to move thetable block toward or away from the grind stone while the pawl 13 locksthe lever and thus the table block into desired adjusted position. Saidtable block has formed in its upper face the semicircular or arcuategroove 17 in which is slidably mounted the carrier segment 1S havingapertures formed in its ends to receive the hooked ends of thefastenings 20 which are pivoted to the frame 1 and serve to hold themember 1S in desired adjusted position. Said member 18 has risingtherefrom near each end a bearing 21 in which is rotatably engaged therounded end 22 of the clamp bar 23 which has secured thereto the clamparms 24 provided with depending end portions 25 for fitting down overthe front edge of the sickle bar 26. Passing centrally through the bar23 is a bolt 27 having engaged on its lower headed end the clamp plate28 and having engaged on its upper end the wing nut 29 which bearsagainst the bar 23, the tightening of the said nut 29 drawing the plate28 upward to cause the same to clamp the sickle -bar against t-he arms24: to securely hold the sickle bar in position. To resiliently swingthe bar 23 and parts carried thereby downward on the ends 22 as pivots,I secure to the rear end of the plate 28 the helical spring29 havingsecured to its rear end the link 30 which has its other end pivoted tothe lever 31. Said lever 31 is pivoted to the upstanding portion of thebracket 32 which is secured to the center of the semicircular member 18,the lever being provided wit-h a locking pawl 33 for engaging thebracket to lock the lever in adjusted position. To allow the rear end ofthe plate 28 to swing downward, I preferably cut away the front centralportion of the base block 8 to provide the recess 34.

From the foregoing description taken in connect-ion with theaccompanying drawings the construction and use of my improved sicklegrinding attachment for grind stones will be readily apparent and itwill be seen that the spring 29 serves to swing t-he teeth 35 of thesickle bar against the grind stone and resiliently hold the same, theshifting of the lever 31 regulating the tension of the spring and theshifting of the lever 12 drawing the block 8 and thus the member 18 andthe sickle toward or` away from the grind stone to change the angle ofgrinding of the bevel on the sickle teeth.

It will further be observed that the swinging or shifting of the member18 in4 the groove 17 serves to vary the angle at which the sides of thevarious teeth strike the grind stone while the anchoring or securingrods 20 serve to fasten the member 18 in desired adjusted Vpositiontoinsure thel correct grinding of the sickle teeth.

It will thus be seen that I have provided a thoroughly practical,efficient and simple atf tachment for grind stones which will serve tosatisfactorily support a sickle bar to insure of exact and readygrinding of the various teeth and cause said teeth to all be cut orground at the same angle while permitting of regulation of the angle ofcut or the bevel of the cut as desired.

I claim:

1. The combination with a frame, of a block slidable thereon, said blockhaving an arcuate guide-way formed therein, an arcuate member slidablein the guide-way, means for locking the arcuate member in adjustedposition, a grind stone supported by the frame adjacent the block, aclamping member pivotally connected to the arcuate member, a levercarried by the arcuate member, a plate secured to the clamping member,and a resilient connection between said plate. and lever for holding anarticle clamped by the clamping member against the grind stone.

2. The combination with a frame, of a grind stone rotatably supportedthereby, a block slidable on said frame, an arcuate guide-way formedtherein, an arcuate member slidably mounted in said guide-way, aclamping member pivoted on the arcuate member, a lever mounted on thearcuate member, a spring having one end secured to the plate and itsother end secured to a .link carried by the lever, said lever beingoperable for swinging the clamp member on its pivot towardfthe grindstone, means carried by the lever to regulate the tension of saidspring, and means for shifting the block and arcuate member relative tothe grind stone.4

3. The combination with a frame, of .a grind stone rotatably supportedthereby, a block slidable on the frame, means for securing the block indesired position relative to the grind stone, said block having anarcuate groove in the upper face thereof, an arcuate member slidablyengaged in the groove, bearings rising from said member near the endsthereof, a clamp bar having its ends pivotally engagedin the bearings,alever mounted on the arcuate member, a plate secured to .the clampmember, and means connecting the plate and clamp bar, means forresiliently swinging the clamp bar on its pivot towardthe grind stone,and means for locking the arcuate member in adjusted position to controlthe angle of grinding by the grind stone of an article held by the clampbar.

In testimony whereof I afiiX my signature, in the presence of twowitnesses.

JAMES H. IREY. lVitnesses ,z

JAMES A. BROWN, W. B. WINDSOR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

